Ventilator



J. MERKEL.

VENTILATOR.

' APPLICATION FILED .IULY I81 I918. 10,537. Patented July 22, 1919.

9 l /0 f '1- I T g 4/ John MerHeL attozmzg5 THE COLUMBIA PLANOGRAFH CO"WASHINGTON. D. C.

' JOHN MEBKEL, OF ROBINSON, NORTH DAKOTA.

Specification of Letters Patent.

VENTILATOR.

Patented July 22, 1919.

Application filed July 18, 1918. Serial No. 245,543.

To all whom it may concern:

Be it known that 1, JOHN MERKEL, citizen of the United States ofAmerica, residing at Robinson, in the county of Kidder and State ofNorth Dakota, have invented certain new and useful Improvements inVentilators, of which the following is a specification, reference beinghad therein to the accompanying drawing.

This invention relates to a ventilator and has for its principal objectthe production of a. ventilator which will allow the air to slowly passtherethinough.

Another object of this invention is the production of means whereby theventilator may be lengthened so as to fit different thicknesses ofwalls.

Another object of this invention is the production of simple andeflicient shaft brackets.

A still further object of this invention is the production of means uponthe outer end of the ventilator for preventing flies, etc., from goingthrough the ventilator and upon the innen end to provide means forclosing said ventilator altogether.

With these and other objects in View, this invention consists of certainnovel coinbinations, constructions and anangemen'ts of parts as will behereinafter fully described and claimed.

In the accompanying drawings:

Figure 1 is a vertical section taken through the ventilator showing thesame in a wall. 7

Fig. 2 is a side elevation of the device showing the same in a wall.

Fig. 3 is an end view of the ventilator with the screening detached.

Fig. 4 is a detail perspective View of the shaft bmacket.

Fig. 5 is a View of the outer end of the ventilator.

By referring to the accompanying drawing by numerals, it will be seenthat 1 designates a wall into which is fitted the ventilator. Thisventilator is provided with a drum 2 which drum is provided with theneck portion 3 upon Which neck portion 3 is mounted the door 4 by meansof the hinge 5. This door l: is hingedly mounted upon the end inside theroom and has for its object to close or open the ventilator as desired.

Upon the outer end of the ventilator is provided the screening 6 whichis held in place by means of the band 7 and the sleeve 8, this sleeve 8beingprovided with the flange 9 whlch will fit snugly [against the outerface 10 of the wall 1. It will be seen that if it is desired to lengthenthe ventilator so as to fit the small differences which are necessarilyfound in the ordinary walls, that the sleeve 8 and band 7 may be pushedoutwardly, sufficiently so that the flange 9 will fit snugly against theouter face of the wall 10. Inside the drum 2 there is provided the shaftbrackets 11 upon which is mounted the shaft 12 which carries the fanwheel 13. By referring especially to Fig. 4.-, it will be seen that theshaft bracket 11 is formed from 2 strips of metal, the inner strip 14 isprovided with an aperture 15 and is bent at its ends so as to form theright angular wings 16. The outer strip 17 is bent intermediate its endsso as to form the pocket 18 and is also bent at its ends so as to formthe right angular wings 16. By referring especially to Figs. 1 and 2, itwill be seen that these wings 16 extend flush with the outer ends of thedrum 2 and will efliciently hold the bracket in its proper position.These strips 14 and 17 are held together! by means of a plurality ofrivets 19.

The shaft 12 is adapted to pass through the aperture 15 and rest withinthe pocket 18 as is clearly shown in Fig. 1. Intermediate the endportions of this shaft 12 is carried the fan 13 which fan is formed froma single piece of sheet metal so as to have a circular periphery. Thefan is out along a plurality of radially extending lines so as to formthe blades 20. These blades 20, it will be seen, are twisted out ofalinement with the hub portion 21 of the fan. This fan is held upon theshaft 12 by any suitable means such as solder, etc.

From the above description, it will be seen that a ventilator has beenproduced which is provided upon its outer end with means for preventingthe entrance of vermin and upon its inner end with means for closing andopening the ventilator as desired. A ventilator has also been providedwhich has a fan rotatably carried therein so as to prevent the air frompassing through the ventilator too quickly and means has been providedfor efficiently holding this fan.

What is claimed as new is:

In a device of the class described, the combination with a drum, of apain" of: sheet metal brackets positioned in said drum, each thebrackets and having its ends hearing bracket comprising an inner and anouter against portions 01 the pockets formed on strip, the inner stripbeing apertured at its the outer strips, and a. fan mounted upon 10center, the outer strip provided With a. said shaft.

pocket at its center positioned. over the aper- In testimony whereof Ihereunto aifix my ture of the inner strip, a shaft extending signature.through the apertures of the inner strips of J OH MERKEL.

Copies of this patent may be obtained for five oentseach, by addressingthe Commissioner of Patents. Washington, D. 0.

